Parts for your 2020 Mitsubishi Asx-Timing belt kit

2020 Mitsubishi ASX timing-belt-kit: belt or chain?

For Australian and New Zealand–spec 2020 Mitsubishi ASX models, a timing-belt-kit is not used. These vehicles run a timing chain, not a timing belt. The 2.0L MIVEC petrol (engine code 4B11) fitted across AU/NZ 2020 ASX models uses a chain-driven cam system, and markets that offered the 2.4L petrol (4B12) also used a chain setup. That means there’s no timing-belt-kit to replace as part of regular servicing.

Technical sources that confirm this include:

• Mitsubishi Motors 4B11/4B12 Engine Workshop Manual, which details a chain-driven camshaft system with chain, guides and hydraulic tensioner (no belt components).
• Mitsubishi ASA/EPC (Electronic Parts Catalogue) for ASX/RVR/Outlander Sport GA-series, showing timing chain, guides and tensioner listings instead of a belt and idlers.
• 2020 Mitsubishi ASX Owner’s/Service Schedule documentation, which does not specify a timing belt replacement interval and notes the use of a timing chain requiring no periodic replacement under normal conditions.

Why no belt? Mitsubishi engineered the ASX’s 4B1x petrol engines around a timing chain for durability over the vehicle’s life, better tolerance to heat and oil contamination, and reduced scheduled maintenance. Chains run in engine oil and typically last the life of the engine when serviced correctly, unlike belts that need periodic renewal with a full timing-belt-kit (belt, tensioner and pulleys).

Even though there’s no timing-belt-kit on a 2020 ASX, looking after the chain matters. Good oil is everything: stick to the logbook service intervals, use the correct viscosity and spec oil, and don’t stretch changes if the vehicle sees short trips or heavy use. A healthy oil supply keeps the hydraulic tensioner and chain in top nick.

What to watch for over time:

• Rattling from the front of the engine on cold start that doesn’t quickly settle.
• Check-engine light with cam/crank correlation fault codes (a sign of chain stretch or tensioner issues).
• Oil leaks near the timing cover or contaminated, sludgy oil.

If any of these pop up, a proper inspection is smart. Chain replacement is uncommon with well-kept ASX engines, but it’s a specialised job if ever needed. Note: some earlier European-market ASX diesels used a timing belt, but those variants weren’t offered new in AU/NZ for 2020.

FAQs

Does the 2020 Mitsubishi ASX have a timing belt or a chain?
It has a timing chain. The 2.0L MIVEC petrol (and 2.4L where offered) uses a chain-driven system, so there’s no timing-belt-kit to replace as part of routine servicing.

When should the timing chain be replaced on a 2020 ASX?
There’s no scheduled replacement interval. With regular oil changes and the correct oil grade, the chain is designed to last the life of the engine. Only investigate replacement if there are symptoms like start-up rattles, related fault codes or confirmed wear/stretch.

Are any 2020 ASX models fitted with a timing belt?
Not in typical Australian or New Zealand 2020 petrol models. Some earlier or non-AU/NZ diesel variants used a belt, but the 2020 AU/NZ petrol ASX runs a timing chain.